Most enzymes are made up of proteins and therefore may be inactivated by A. changes in temperature B. changes in pH C. salt concentration D. all of the above

Which of the following is incorrect about chymotrypsin, trypsin, and elastase? a. They catalyze the hydrolysis of the peptide bond b. They have similar amino acid sequences and tertiary structures c. None; all the other choices are correct Od. They have different substrate binding sites

The proteins : oxidase ,kinase,lipase, isomerase are all known to function as  a. channels b. transporters c.receptors d. enzymes e. none of the above

Red blood cells shrivel when placed in a 10% sucrose solution. When first placed in the solution, the solute concentration of the cell is______ the concentration of the sucrose solution. After the cells shrivel, their solute concentration is______ the concentration of the sucrose solution. A. Greater than... equal to B. Equal to... equal to C. Less than... greater than D. Less than... equal to E. Greater than... less than